Brake disks 101

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kelvingenders
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Brake disks 101

Post by kelvingenders » 30 Sep 2013 10:19 am

Hi all, tried to bleed my system and managed to do this
brake 2.jpg
brake 2.jpg (94.67 KiB) Viewed 7788 times
.
I kept pumping the break pedal and could not get rid of the air...hence cylinder popped.

Any ideas of why?

macplaxton
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Re: Brake disks 101

Post by macplaxton » 30 Sep 2013 12:19 pm

Because you didn't have the shoes roughly adjusted and the drum on at the time...

or because you didn't wire the cylinder pistons down to stop them popping...
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82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

kelvingenders
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Re: Brake disks 101

Post by kelvingenders » 30 Sep 2013 12:27 pm

What is wire the cylinders....can you explain max...no drum on when doing this.... :360:

macplaxton
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Re: Brake disks 101

Post by macplaxton » 30 Sep 2013 12:51 pm

If you don't want to put the drum on when bleeding then you find some garden wire or something that you can wind round the cylinder to hold the piston(s) in.


Just stick the drum back on


It looks as if you haven't a scooby what you're doing. Get someone who does. :wink:
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82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

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Chris_C
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Re: Brake disks 101

Post by Chris_C » 30 Sep 2013 04:49 pm

The cylinder is stopped from falling apart because the shoes hit the drum. With no drum, there is nothing to stop the shoes moving further and further apart.
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Ride_on
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Re: Brake disks 101

Post by Ride_on » 30 Sep 2013 09:13 pm

You also need to reset the self-adjuster, and wind it back in so you can get the drum back on.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

kelvingenders
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Re: Brake disks 101

Post by kelvingenders » 03 Oct 2013 12:06 pm

Ride on, once again you are so right...cheers...Kelvin- Thanks for the many parts and advice. Never a problem and had gone out of your way to send items to another part of the world.

I just want to discuss the negative items faced on the forum from max plaxton!!!!

"It looks as if you haven't a scooby what you're doing". Get someone who does."".
thanx Max plaxton -is there ever a time you can be positive? the whole idea of the forum is that we can learn...however you must be god, because you have never had to do things twice. Why bother saying anything at all. Just call it volvo 300 ifyoucan'trepairyoureawanker!!!! Just don't say you are a pleb, that's pointless

Kelvin :360: :D

macplaxton
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Re: Brake disks 101

Post by macplaxton » 03 Oct 2013 03:04 pm

Me? I can be positive too, look at my back catalogue of post and you'll see the less grumpy posts. I'll go to the trouble of digging out stuff needed.

Brakes are critical safety items. For someone to work on them requires a basic amount of competence. In fact in the other post I did mention wiring up the cylinders. I spent some time trying to find a picture for you that illustrated what I meant and I couldn't find an appropriate one. Wiring up cylinders involves getting some garden wire or similar and wrapping it around the cylinder to hold the pistons inside the wheel cylinder. The photos posted of your problem *appears* to be first hand to be of someone who hasn't even read the manual. Now we all make mistakes, I've wrecked a few motors over the years in the pre-internet days and learnt the hard way on not how to brake them. I picked up books and read them cover-to-cover to learnt the right way to do things. I do my homework before I start a job, if it involves something tool I haven't got, I'll get it, make it or have it made or just get someone else to do it.

Yes you can learn a certain to a certain extent on a forum. You can probably learn more by watching and asking someone actually doing it. It's probably more helpful when someone asks first how to do a job rather than attempting it first and making a hash of it. It's also helpful to recognise when you are out of your depth and should get someone round to help or give the job to a pro.

I'll praise when it's deserved. I'll criticise when it's merited.
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Ride_on
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Re: Brake disks 101

Post by Ride_on » 04 Oct 2013 01:23 am

To be honest I was a little apprehensive about giving help to someone who does not seem to have read the manual or understand how the brakes work. Richard can be a bit harsh, but he has a point.

When I was 18 and didn't know what I was doing I read the manual, and kept re-reading it until I understood the procedure, and had a good idea of how the thing worked.

Please read the service procedures before working at the brakes.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Cliché Guevara
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Re: Brake disks 101

Post by Cliché Guevara » 04 Oct 2013 02:24 am

1,You must have the drums on when bleeding breaks.
2,You should do the one furthest from the master cylinder/reservoir first and work your way towards it.
3,Dont remove the front calipers to bleed them.
We all make mistakes and we learn from them.As I'm sure that you will never do this again.What you've done is the same as fixing a leaky tap without turning off the main.I'm not trying to be mean,we all do it from time to time.Especially if we don know.

I fixed a leak at the bottom of my swimming pool by emptying it and sticking on a patch.The next day when I went to fill it it had caved in!Thankfully my house insurance covered it.

BUT when I called the pool people for repair quotes I was made to feel like you say "a wanker" because I emptied the pool instead of diving to the bottom of a full pool with special underwater patches.

Every day is a school day/shit happens/we learn from mistakes(sometimes :lol: ) and all those other clichés.

More importantly did you get your brakes sorted?

One last tip.If you put new pads on the front,YOU MUST pump the brakes before driving off.I learnt the "interesting "way.The first time you try to stop your foot hits the floor and the car keeps on going.

Hope this helps 340pw

kelvingenders
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Re: Brake disks 101

Post by kelvingenders » 04 Oct 2013 01:48 pm

Brakes sorted....no problems...not used to drum....or negative vibes

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bogbasic
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Re: Brake disks 101

Post by bogbasic » 06 Oct 2013 11:33 pm

Been messing with bangers since '85 and I still do exactly what you did.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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